Street-sweeping brush



c. w. LUND. STREET SWEEPING BRUSH. APPLICATION FILED MAR. l0. |921. 1,399,634. Patented Dec. 6,1921.

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noem/box C. W. LUND..v STREET SWEEPING BRUSH. APPucATloN FILED MAR. lo. 192|.

Patented Dec. 6, 1921.

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STREET SWEEPING BRUSH.

APPLICATIION FILED MAR. l0, |921.

Patented Dec. 6, 1921-..

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(lrgnal application led. April 11,191.9,Beria1 No. 289,326. Divided and this application filed March l0,

' 1921. Serial No. 4515149. p

To all whom it may concern:`

` Be it known that l CHARLES llll. linnn, a

citizen of the United ltates, residing,` at Vlillows, in the county of `(llenn and State of Galifornia,` have invented certain new and useful improvements in StreetSweeping` ldrushes; andll dodeclare the following to be a full, clear, and enact description of the invention, such as will enable others skilled in the art to which it appertains to inalre and use the saine, y y l rllhe `present application is a division of niy U. il. application, which terminated in U. Patent lilo. 'lllll of ll-.pril 19, 1921, and for features of construction herein shown but not specifically described, refer ence may beniade to this parent case. y

rlhe object of the invention isto provide an improved forni of rotary brush which is readily adjustableas its bristles wear down from engagement Withthe street, novel provision being rnadefor attachingthese bristles to their carryingheads in such arnanner that they may berevcrsed whenever desired, so that if they become bowed in one direction, this bow` can be counteracted by revers ing the bristles soithat the strain thereon is reversed. y

With the foregoing and minor objects in Iview, the invention resides in the novel construction and arrangement of parts hereinafter described and particularly pointed out in the appended claims7 the descriptive matter beings; supplemented by the accompanying drawnings.`

Figure l is a longitudinal sectional view of a street snweepiunn,i machine equipped with the improved brush. y

E2 and 3 are vertical transverse sectional views as indicated by the irregular lines and of lling. l.

The numeral l designates the inain housing; of a wheel supported motor driven street sweeping machine which is provided at its front end with transversely elongated brush casing; which may well be supported by a pair of longitudinal levers 7G, the rear ends of said levers beine" fulcrurned as shown at 78 while their front ends are equipped with suitable adiustinp; means operated from the drivers seat by an appropriate shaft 82. The lower side of casing;r 55 is provided with an inlet opening` 62 and with a dust pan at Specification of Letters Patent.

Patented Dec, d tbZil.

the front side of said opening, while the top ofthe casingi is formed with an outlet 5 6 which discharges rearwardly into a receiving` compartment R in which bags and racks may be placed and from which the air escapes through suitable air screens. A brush carrying shaft Sel entends axially through the casing; 55 and is mounted in appropriate bearings 85 which are preferably of the ball type, tiny suitable ineans such as chains ll are employed for driving:1 the shaft 84: and said chains are preferably driven by motor power, a

.Hubs 86 are lreyed on the shaft @il to carry ragid radial arms 8'?. upon which brush heads 88, extending parallel with the shaft Se? are slidably inounted as inost clearly illustrated in Figs. l and 3. Jack screws 89 are secured to `thebrush heads 88 and are slidably received in tubular arrns 90 radiatfroin additional hubs 91 on the shaft 8a, and pinions 92 are threaded on said screws @Sand are held against the outer ends ofthe arins 90 by branch arms 90a. Bevel gears 93 which are mounted on and rotatable with respect to the shaft 84, meshwith the pinions 92 for rotating thein in unison and it will thus he seen that the brush heads 88 may be forced inwardly or outwardly as required, incre particularly for the purpose of coinpensatinp; for wear of the brush bristles 94. For simultaneously rotating the gears 93, pin ,(ears ortho lilre 95 may be carried by a Shaft 96 extendingr parallel with the shaft 84 and carried by suitable bearing1 arms 97 secured to said sh aft 84. A crank or the like 98 may be provided for turninp` shaft 96 as reduired.

l preferably attach the brush bristl 94- to the heads 88 in the manner illustrated incr-e particularly in 'l and S The es of each head are channeled to a slio'ht o eut for proper Contact with channeled metal bars 99, between whi ch and bars 4100, the bristles are clamped by bolts 10]. passing through the bars 99 and 100 and the intervening' bristles. Longer bolts 102 pass through these parts and through the heads 88 to lsecure the former to the lattern at the saine time permitting easy detachment thereof when necessary lf all of the bristles should becoine bowed in one direction from continual operation9 the bolts 102 may be ,ren :looY

moved so that reversal of such bristles is possible, to exert strain thereon in the opposite direction.

As the machine is propelled over the street the brush 34 is. rapidly rotated so that its lower portion moves forwardly to sweep the street and carry the sweepings upwardly. During this rapid motion of the brush, forcible air currents are set up as indicated by the arrows in Fig. 1 and these airfcurrents 'carry the sweepings into the receiving compartment R in which they are collected in sacks or the .like to be subsequently removed. The airrescapes through the air screens and `any dust which is too fine to sett-le into the sacks is trapped in a deadv air compartment C. `If desired, water maybe supplied to the brush from a tankr', by means of a suitable pipe .72 so as to 'settle some of the dust, and if the dampened ySweepings have a tendency to cling to the vbrush bristles, Athese bristles may be cleaned by operating the lever 60 to force the 'cleaning plate 58 downwardly so that itsffree edge engages said bristles. If the bristles become bowed in one direction after continual sweeping, they may be easily detached from the heads -88 and reversed, and'wheneversaid bristleswear down to an appreciable extent, the crank 98 is operated to rotate the .gears93, causing them to turn the threaded pinions 92 and yadjust the jack screws k89 so as to force-the brush heads 88 outwardly to the required extent. c

From Vthe foregoing, taken v*in connection with the accompanying drawings, it will be lseen that I havedevised'y a highly efficient and advantageous street sweepingY brush, and since probably the best results may be obtained from the details disclosed, such de ,for rotating said gears.

tails may be followed. However, within the scope of the invention as claimed, numerous changes may be made.

I claim:

l. In a street sweeping machine, a shaft able on said shaft-and meshing with saidf pinions, and means for rotating said gears.

2. In a street sweeping machine, a shaft and rigid arms radiating therefrom, brush heads slidable on said arms, tubular arms ra diating from said shaft, screws secured to saidbrush heads and sliding in said tubular arms,`|pinions threaded on said screws and bearing against the outer ends of said ti'ibulai` arms, gears rotatable on said shaft and meshing with said pinions, and means 3. In a Vstreet sweeping machine, a brush head longitudinally channeled on one edge, a' slightly channeled metal strip contacting with said channeled edge of-Said head, bristles whose inner ends extend across the channel of said metal strip, a bar contacting with the outerv side of said bristles opposite the channel of said strip, clamping bolts passing through said bar and strip and clamping said bristles between them, the heads of said bolts being positioned in the channel of said brush head, and other bolts lpassing through said headsaidstrip and said bar for removably securing the strip, bar and bristlesl to if' the head. Y

In testimony whereof I have hereunto set my hand. I

CHARLES lli/'ALTER LUND. 

